1 /*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #define LOG_TAG "UsbHostManagerJNI"
18 #include <nativehelper/JNIHelp.h>
19 #include <stdlib.h>
20 #include <usbhost/usbhost.h>
21 #include <usbhost/usbhost_jni.h>
22
23 #include "jni.h"
24 #include "utils/Log.h"
25
26 static const int USB_CONTROL_TRANSFER_TIMEOUT_MS = 200;
27
28 // com.android.server.usb.descriptors
29 extern "C" {
Java_com_android_server_usb_descriptors_UsbDescriptorParser_getRawDescriptors_1native(JNIEnv * env,jobject thiz,jstring deviceAddr)30 jbyteArray JNICALL Java_com_android_server_usb_descriptors_UsbDescriptorParser_getRawDescriptors_1native(
31 JNIEnv* env, jobject thiz, jstring deviceAddr) {
32 const char *deviceAddrStr = env->GetStringUTFChars(deviceAddr, NULL);
33 struct usb_device* device = usb_device_open(deviceAddrStr);
34 env->ReleaseStringUTFChars(deviceAddr, deviceAddrStr);
35
36 if (!device) {
37 ALOGE("usb_device_open failed");
38 return NULL;
39 }
40
41 int fd = usb_device_get_fd(device);
42 jbyteArray descriptors = usb_jni_read_descriptors(env, fd);
43 usb_device_close(device);
44 return descriptors;
45 }
46
Java_com_android_server_usb_descriptors_UsbDescriptorParser_getDescriptorString_1native(JNIEnv * env,jobject thiz,jstring deviceAddr,jint stringId)47 jstring JNICALL Java_com_android_server_usb_descriptors_UsbDescriptorParser_getDescriptorString_1native(
48 JNIEnv* env, jobject thiz, jstring deviceAddr, jint stringId) {
49
50 const char *deviceAddrStr = env->GetStringUTFChars(deviceAddr, NULL);
51 struct usb_device* device = usb_device_open(deviceAddrStr);
52 env->ReleaseStringUTFChars(deviceAddr, deviceAddrStr);
53
54 if (!device) {
55 ALOGE("usb_device_open failed");
56 return NULL;
57 }
58
59 int fd = usb_device_get_fd(device);
60 if (fd < 0) {
61 ALOGE("usb_device_get_fd failed");
62 usb_device_close(device);
63 return NULL;
64 }
65
66 // Get Raw UCS2 Bytes
67 jbyte* byteBuffer = NULL;
68 size_t numUSC2Bytes = 0;
69 int retVal =
70 usb_device_get_string_ucs2(device, stringId,
71 USB_CONTROL_TRANSFER_TIMEOUT_MS,
72 (void**)&byteBuffer, &numUSC2Bytes);
73
74 jstring j_str = NULL;
75
76 if (retVal == 0) {
77 j_str = env->NewString((jchar*)byteBuffer, numUSC2Bytes/2);
78 free(byteBuffer);
79 }
80
81 usb_device_close(device);
82
83 return j_str;
84 }
85
86 } // extern "C"
87